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Continue to Chat藤井2冠王位防衛! 序中盤での過去最長長考に秘められたものとは 真田圭一八段解説 | ENCOUNT https://blog.40ch.net/2021/08/26/fujii-2-crown-defense-what-was-hidden-in-the-longest-thought-ever-in-the-middle-of-the-beginning-is-keiichi-sanadas-eight-stage-commentary/